Examine source code of Scrumify

{
  "name": "__MSG_appName__",
  "version": "0.0.19",
  "manifest_version": 2,
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "images/icon-16.png",
    "128": "images/icon-128.png"
  },
  "default_locale": "en",
  "content_scripts": [
    {
      "matches": [
        "http://*.atlassian.net/*",
        "https://*.atlassian.net/*"
      ],
      "css": [
        "styles/jira.css"
      ],
      "js": [
        "scripts/contentscript.js"
      ],
      "run_at": "document_end",
      "all_frames": false
    }
  ],
  "permissions": [
    "http://*.atlassian.net/*",
    "https://*.atlassian.net/*"
  ],
  "web_accessible_resources": [
    "scripts/script.js"
  ]
}